Fluid delivery device with autocalibration

A fluid pumping and dispensing device technology, which is applied in liquid distribution, delivery or transfer devices, test/calibration devices, test/calibration volume flow, etc., can solve the problems of dose volume deviation, additional deviation enhancement, etc., and achieve economical and reliable Effect

Active Publication Date: 2008-05-21
ABBOTT DIABETES CARE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the maximum deviation of each component is reached at the same time, it will cause the dose volume to deviate from the nominal value ± 15%
This problem is further enhanced by the additional deviation in combined diaphragm diameter and piston head diameter

Method used

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  • Fluid delivery device with autocalibration
  • Fluid delivery device with autocalibration
  • Fluid delivery device with autocalibration

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Embodiment Construction

[0019] It is important to eliminate variations between one pump and another (of the same design), which are the result of manufacturing limitations. The present invention can be used to minimize the effects of these deviations and achieve precise delivery in any type of liquid pump.

[0020] As discussed in the Background, there is one type of liquid pump for which the present invention is particularly advantageous, namely the small piston type pump. Piston-diaphragm assemblies for small pumps require extremely high manufacturing tolerances in order to achieve reproducible dose volumes from one pump to another. Even when manufactured with high precision, there may be non-negligible deviations from one pump of a given design to another. This is not ideal, especially in applications involving pumps for drug delivery or other medical applications.

[0021] The present invention provides a simple, economical and reliable mechanism and method for minimizing or "zeroing out" pump-...

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Abstract

A micro fluid delivery device is particularly useful in medical applications. The device may be worn or carried by the user and may deliver drugs or other medicaments to the user or patient. The device has a control system that accepts input from the user and controls all aspects of operation of the device. The control system measures the output of the pump and adjusts the output of the pump to achieve the desired dosage rate and size. This eliminates differences from pump to pump that result from inevitable variations in the manufacturing of such small scale affordable devices.

Description

technical field [0001] The present invention relates generally to fluid delivery devices such as pumps, and more particularly to the control and use of small pumps. Background technique [0002] Although the invention can be used with many different types and sizes of pumps, the invention is especially useful for small or miniature disposable pumps. One application of such pumps is the delivery of insulin. [0003] A small or micropump uses a piston to push a volume of liquid determined by the volume of the piston (inner diameter x stroke) and the volume of an accompanying diaphragm (diaphragm). The dose of liquid, eg insulin, is assumed for discussion purposes to be equal to the volume of liquid displaced in one delivery stroke of the piston. [0004] A characteristic of small pumps is that the piston-diaphragm assembly requires extremely high manufacturing tolerances in order to achieve reproducible dose volumes from one pump to another. For example, a small piston-type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D7/00G05D11/00B67D7/08A61M5/142F04B1/00F04B17/00F04B17/04F04B43/04F04B49/06F04B51/00G01F1/708G01F11/02G01F25/00G05D7/06
CPCF04B49/065F05C2251/08F04B2205/09G01F25/0007F04B43/043G05D7/0694A61M5/14216G01F25/0084A61M5/14244G01F1/708F04B51/00A61M2205/0288G01F11/029A61M2205/3317A61M2205/702G01F25/10
Inventor 本杰明·M·拉什
Owner ABBOTT DIABETES CARE INC
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